1
FOUR PORT BYPASS FOR FC-AL
S2071
January 6, 2000 / Revision C
FEATURES
Micropower Bipolar Technology
ANSI X3T11 Fibre Channel Compatible
Four Port Bypass Circuits
Suitable for both Coaxial and Optical Link
Nominal deterministic Jitter
10ps
Low Power Operation 0.73 W Typical
44 Pin PQFP Package
3.3V Supply
APPLICATIONS
RAID
JBOD
FC-AL Nodes
Figure 1. S2071 Functional Block Diagram
DEVICE
SPECIFICATION
FOUR PORT BYPASS FOR FC-AL
S2071
GENERAL DESCRIPTION
The Four Port Bypass for FC-AL Circuit is used in
full-speed (1.0625 Gbps) Disk Arrays. It contains
four port bypass circuits. The S2071 may be used to
implement a single chip Arbitrated Loop Port Bypass
Node. The S2071 performs the function of four port
bypass circuits.
FUNCTIONAL DESCRIPTION
The S2071 functional block diagram is shown in Fig-
ure 1. The S2071 performs the function of a Port
Bypass Circuit (PBC) for nodes in a FC-AL system.
The low jitter accumulation of the port bypass path is
essential in these systems.
Jitter Performance
The primary AC parameter of importance is
determinsitic jitter accumulation (data eye degrada-
tion) inserted by the port bypass circuit. The S2071
utilizes high bandwidth, low skew differential circuitry
to provide symmetric rise and fall times and excel-
lent noise immunity.
For arrays of disk drives greater than 4, it is recom-
mended that the S2071 be cascaded with the S2058
(Port Bypass with Repeater) in a ratio of 1:1 to per-
form clock and data retiming. This ensures optimal
jitter performance for the disk array system.
0
1
0
1
0
1
0
1
DDO0 DDI0
EN0
DDO1
DDI1
EN1
DDO2
DDI2
EN2
DDO3 DDI3
EN3
IN
OUT
2
FOUR PORT BYPASS FOR FC-AL
S2071
January 6, 2000 / Revision C
Figure 2. FC-AL JBOD Application for Repeaters
0
1
0
1
0
1
0
1
Disk
Storage
FC-AL Disk Drive
LRC
Interlock
S2070
FC
XCVR
E_STORE
Disk
Storage
FC-AL Disk Drive
LRC
Interlock
E_STORE
Disk
Storage
FC-AL Disk Drive
LRC
Interlock
E_STORE
Optics
or
Copper
S2058
Dual
SC
or
DB-9
Normal
Normal
Normal
Bypass
Pulldown for Bypass in
Absence of Disk Drive
S2071
S2058
S2070
FC
XCVR
S2070
FC
XCVR
3
FOUR PORT BYPASS FOR FC-AL
S2071
January 6, 2000 / Revision C
Table 1. Pin Assignment and Descriptions
e
m
a
N
n
i
P
l
e
v
e
L
O
/
I
#
n
i
P
n
o
i
t
p
i
r
c
s
e
D
P
T
U
O
N
T
U
O
.
f
f
i
D
L
C
E
P
V
L
O
4
2
5
2
e
e
S
(
.
p
o
o
l
e
h
t
n
i
C
B
P
t
x
e
n
e
h
t
o
t
d
e
t
c
e
n
n
o
c
e
b
o
t
t
u
p
t
u
o
l
a
i
r
e
S
)
.
2
e
r
u
g
i
F
N
N
I
P
N
I
.
f
f
i
D
L
C
E
P
V
L
I
9
0
1
.
t
i
u
c
r
i
C
s
s
a
p
y
B
t
r
o
P
s
u
o
i
v
e
r
p
e
h
t
m
o
r
f
t
u
p
n
i
l
a
i
r
e
S
P
0
I
D
D
N
0
I
D
D
P
1
I
D
D
N
1
I
D
D
P
2
I
D
D
N
2
I
D
D
P
3
I
D
D
N
3
I
D
D
.
f
f
i
D
L
C
E
P
V
L
I
4
3
1
4
0
4
5
3
4
3
8
2
7
2
y
b
n
e
v
i
r
d
e
b
d
l
u
o
h
s
s
t
u
p
n
i
e
s
e
h
T
.
s
s
a
p
y
b
t
r
o
p
e
h
t
o
t
t
u
p
n
i
l
a
i
r
e
S
.
s
s
a
p
y
b
t
r
o
p
e
h
t
o
t
d
e
t
c
e
n
n
o
c
e
v
i
r
d
k
s
i
d
L
A
-
C
F
e
h
t
P
0
O
D
D
N
0
O
D
D
P
1
O
D
D
N
1
O
D
D
P
2
O
D
D
N
2
O
D
D
P
3
O
D
D
N
3
O
D
D
L
C
E
P
V
L
O
7
6
4
4
3
4
8
3
7
3
1
3
0
3
t
u
p
n
i
e
h
t
e
v
i
r
d
d
l
u
o
h
s
s
t
u
p
t
u
o
e
s
e
h
T
.
s
r
i
a
p
t
u
p
t
u
o
s
s
a
p
y
b
t
r
o
P
.
e
v
i
r
d
k
s
i
d
L
A
-
C
F
e
h
t
f
o
s
t
r
o
p
0
N
E
1
N
E
2
N
E
3
N
E
L
T
T
I
5
1
6
1
7
1
8
1
t
r
o
p
e
h
t
,
e
v
i
t
c
a
n
i
s
i
N
E
n
e
h
W
.
h
g
i
H
e
v
i
t
c
A
.
l
o
r
t
n
o
C
s
s
a
p
y
B
t
r
o
P
s
s
a
p
y
b
t
r
o
p
,
e
v
i
t
c
a
s
i
N
E
n
e
h
W
.
e
d
o
m
s
s
a
p
y
b
n
i
e
b
ll
i
w
s
s
a
p
y
b
.
e
d
o
m
l
a
m
r
o
n
n
i
e
b
ll
i
w
D
N
G
d
n
u
o
r
G
,
1
1
,
8
,
1
,
9
1
,
3
1
,
2
1
,
3
2
,
2
2
,
9
3
,
3
3
e
r
a
d
n
a
,
e
c
a
f
r
u
s
e
i
d
e
h
t
o
t
d
e
t
n
u
o
m
y
ll
a
c
i
s
y
h
p
e
r
a
s
n
i
p
d
n
u
o
r
G
l
a
m
r
e
h
t
t
s
e
b
r
o
F
.
h
t
a
p
l
a
m
r
e
h
t
e
h
t
f
o
t
r
a
p
t
n
a
t
r
o
p
m
i
n
a
d
n
u
o
r
g
a
o
t
d
e
t
c
e
n
n
o
c
e
b
d
l
u
o
h
s
s
n
i
p
d
n
u
o
r
g
ll
a
,
e
c
n
a
m
r
o
f
r
e
p
.
e
l
b
i
s
s
o
p
f
i
s
a
i
v
e
l
p
i
t
l
u
m
g
n
i
s
u
,
e
n
a
l
p
C
C
V
,
4
1
,
5
,
2
,
1
2
,
0
2
,
9
2
,
6
2
2
4
,
6
3
,
2
3
.
y
l
p
p
u
s
r
e
w
o
P
V
3
.
3
+
4
FOUR PORT BYPASS FOR FC-AL
S2071
January 6, 2000 / Revision C
Figure 3. S2071 Pinout Package
1
2
3
4
5
6
7
8
9
10
11
14
15
16
17
18
19
20
21
22
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
S2071
44 Pin PQFP
TOP VIEW
GND
VCC
DD03P
DD03N
VCC
DDI3P
DDI3N
VCC
OUTN
OUTP
GND
12
13
VCC
EN0
EN1
EN2
EN3
GND
VCC
VCC
GND
GND
GND
44
43
VCC
DDI1P
DDI1N
GND
DDO2P
DDO2N
VCC
DDI2P
DDI2N
DDO1P
DDO1N
GND
VCC
DDI0N
DDI0P
VCC
DDO0N
DDO0P
GND
INN
INP
GND
5
FOUR PORT BYPASS FOR FC-AL
S2071
January 6, 2000 / Revision C
Figure 4. S2071 44 Pin PQFP Package
e
c
i
v
e
D
r
e
w
o
P
e
g
a
k
c
a
P
x
a
M
1
A
J
1
7
0
2
S
W
9
9
.
0
W
/
C
5
5
Thermal Management
1. Power is measured with outputs terminated.
PDF 
ZIP